Remember the first time you heard "I Kissed A Girl" in early 2008? Whether you hated it or thought it was brilliant, you probably thought that Katy Perry's career would last about as long as Jill Sobule's – the last artist to land on the charts with a song called "I Kissed A Girl." Katy didn't pull a Sobule though. She just kept releasing shockingly popular hits. Even the haters can't hate on "Teenage Dream." It's just too good. Her second album seems to be a modern-day Thriller, just scoring number one hit after number one hit. She's now on a sold-out arena tour – and has been on the cover of Rolling Stone twice.